BirdAnalyst
Species · Washington · BBS 2025 Release · 1966–2024

Golden Eagle Population Trend in Washington

All statesGeneralists

Golden Eagle in Washington has edged down: down 11% on the route-weighted index since 1973.

-11%Since 1973TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
19Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
36YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Golden Eagle Trends in WashingtonNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Golden Eagle in Washington. See the full index history below.

Golden Eagle Population Forecast in Washington

If the recent trend holds, Golden Eagle in Washington is projected to fall about 32% by 2029 — from 0.05 in 2024 to a central estimate of 0.04 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±49.6%, with 100% of held-out values landing inside the 95% band.

-32%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.04Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0795% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±49.6%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Golden Eagle in Washington is projected to fall about 32% by 2029 — from 0.05 in 2024 to a central estimate of 0.04 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±49.6%, with 100% of held-out values landing inside the 95% band.19692029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20250.040.000.08
20260.040.000.08
20270.040.000.08
20280.040.000.07
20290.040.000.07

Golden Eagle Survey Routes in Washington

Routes recording Golden Eagle in Washington.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Keller319881969
Nighthawk220241993
Hurricane Rg220072007
Pomeroy220222013
Port Angeles119851985
Twisp120171984
Brewster120141977
Cascade Riv119981998
Winthrop120191989
Tonasket120092000
Cusick120242024
Ewan120022002
Curlew120122006
Potholes120142014
Mazama120132011
Laurier120212005
L. Wenatchee120232023
Moses Coulee120161995
Yakima120231997

Golden Eagle Population Trend in Other States

alaskaarizonacaliforniacoloradoidahomontananebraskanevadanew-mexiconew-yorknorth-dakotaoklahomaoregonsouth-dakotatexasutahwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.